<template>
  <div class="wrapper">
    <!-- header部分 -->
    <header>
      <p>商家列表</p>
      <div class="back-btn" @click="goBack()">
        <i class="fa fa-arrow-left"></i>
      </div>
    </header>
    <!-- 商家列表部分 -->
    <ul class="business">
      <li v-for="item in businessArr" @click="toBusinessInfo(item.businessId)">
        <div class="business-img">
          <img :src="item.businessImg" />
          <div class="business-img-quantity" v-show="item.quantity > 0">
            {{ item.quantity }}
          </div>
        </div>
        <div class="business-info">
          <h3>{{ item.businessName }}</h3>
          <p>
            &#165;{{ item.starPrice }}起送 | &#165;{{ item.deliveryPrice }}配送
          </p>
          <p>{{ item.businessExplain }}</p>
        </div>
      </li>
    </ul>
    <div class="bl"></div>
    <!-- 底部菜单部分 -->
    <Footer></Footer>
  </div>
</template>
<script>
import Footer from "../components/Footer.vue";

export default {
  name: "BusinessList",
  data() {
    return {
      orderTypeId: this.$route.query.orderTypeId,
      businessArr: [],
      user: {},
    };
  },
  created() {
    this.user = this.$getSessionStorage("user");

    //根据orderTypeId查询商家信息
    this.$axios
      .post(
        "BusinessController/listBusinessByOrderTypeId",
        this.$qs.stringify({
          orderTypeId: this.orderTypeId,
        })
      )
      .then((response) => {
        this.businessArr = response.data;
        //判断是否登录
        if (this.user != null) {
          this.listCart();
        }
      })
      .catch((error) => {
        console.error(error);
      });
  },
  components: {
    Footer,
  },
  methods: {
    goBack() {
      this.$router.back();
    },
    listCart() {
      this.$axios
        .post(
          "CartController/listCart",
          this.$qs.stringify({
            userId: this.user.userId,
          })
        )
        .then((response) => {
          let cartArr = response.data;
          //遍历所有食品列表
          for (let businessItem of this.businessArr) {
            businessItem.quantity = 0;
            for (let cartItem of cartArr) {
              if (cartItem.businessId == businessItem.businessId) {
                businessItem.quantity += cartItem.quantity;
              }
            }
          }
          this.businessArr.sort();
        })
        .catch((error) => {
          console.error(error);
        });
    },
    toBusinessInfo(businessId) {
      this.$router.push({
        path: "/businessInfo",
        query: { businessId: businessId },
      });
    },
  },
};
</script>
<style scoped>
/****************** 总容器 ******************/
.wrapper {
  width: 100%;
  height: 100%;
}
/****************** header部分 ******************/
.wrapper header {
  width: 100%;
  height: 12vw;
  background-color: #0097ff;
  color: #fff;
  font-size: 4.8vw;
  position: fixed;
  left: 0;
  top: 0;
  z-index: 1000;
  display: flex;
  justify-content: center;
  align-items: center;
}
/****************** 商家列表部分 ******************/
.wrapper .business {
  width: 100%;
  margin-top: 12vw;
  margin-bottom: 14vw;
}
.wrapper .business li {
  width: 100%;
  box-sizing: border-box;
  padding: 2.5vw;
  border-bottom: solid 1px #ddd;
  user-select: none;
  cursor: pointer;
  display: flex;
  align-items: center;
}
.wrapper .business li .business-img {
  /*这里设置为相当定位，成为business-img-quantity元素的父元素*/
  position: relative;
}
.wrapper .business li .business-img img {
  width: 20vw;
  height: 20vw;
}
.wrapper .business li .business-img .business-img-quantity {
  width: 5vw;
  height: 5vw;
  background-color: red;
  color: #fff;
  font-size: 3.6vw;
  border-radius: 2.5vw;
  display: flex;
  justify-content: center;
  align-items: center;
  /*设置成绝对定位，不占文档流空间*/
  position: absolute;
  right: -1.5vw;
  top: -1.5vw;
}
.wrapper .business li .business-info {
  margin-left: 3vw;
}
.wrapper .business li .business-info h3 {
  font-size: 3.8vw;
  color: #555;
}
.wrapper .business li .business-info p {
  font-size: 3vw;
  color: #888;
  margin-top: 2vw;
}
.wrapper .bl {
  width: 100%;
  height: 20vw;
  color: #ffffff;
}
.wrapper .back-btn {
  position: fixed;
  top: 2vw;
  left: 2vw;
  font-size: 4vw;
  color: #fff;
  cursor: pointer;
  user-select: none;
  z-index: 1000;
}
</style>
